<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <el-alert
                title="添加商品信息"
                type="info"
                show-icon
                :closable="false"
                center>
            </el-alert>
            <el-steps :active="activeIndex- 0" finish-status="success" align-center>
              <el-step title="商品信息"></el-step>
              <el-step title="商品参数"></el-step>
              <el-step title="商品属性"></el-step>
              <el-step title="商品图片"></el-step>
              <el-step title="商品内容"></el-step>
              <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
             <el-tabs :tab-position="'left'"  v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                 <el-tab-pane label="基本信息" name="0">
                      <el-form-item label="商品名称" prop="goods_name">
                         <el-input v-model="addForm.goods_name"></el-input>
                      </el-form-item>
                      <el-form-item label="商品价格" prop="goods_price">
                         <el-input v-model="addForm.goods_price"></el-input>
                      </el-form-item>
                      <el-form-item label="重量" prop="goods_weight">
                         <el-input v-model="addForm.goods_weight"></el-input>
                      </el-form-item>
                      <el-form-item label="商品数量" prop="goods_number">
                         <el-input v-model="addForm.goods_number"></el-input>
                      </el-form-item>
                     <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader
                            v-model="addForm.goods_cat"
                            :options="catelist"
                            :props="selectCatesProps"
                            size="small"
                            @change="parentCateChanged">
                        </el-cascader>
                     </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品参数" name="1">
                     <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                        </el-checkbox-group>
                     </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品属性" name="2">
                     <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                     </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品图片" name="3">
                     <!-- action图片上传地址 -->
                    <el-upload
                      :action="uploadUrl"
                      :on-preview="handlePreview"
                      :on-remove="handleRemove"
                      list-type="picture"
                      :headers="headerObj"
                      :on-success="handleSuccess">
                      <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                 </el-tab-pane>
                 <el-tab-pane label="商品内容" name="4">
                     <!-- 富文本编辑器组件 -->
                     <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!-- 添加商品按钮 -->
                     <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                 </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>
        <!-- 添加商品图片预览框 -->
        <el-dialog
          title="图片预览" :visible.sync="addlogVisible" width="50%">
          <img :src="prePath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
    data() {
        return {
           activeIndex: '0',
           addForm: {
               goods_name: '',
               goods_price: 0,
               goods_number: 0,
               goods_weight: 0,
               //    商品分类选择完成后保存的数据
               goods_cat: [],
            //    图片的数组
               pics: [],
            //    商品详情描述
            goods_introduce: '',
            attrs: []

           },
           addFormRules: {
            goods_name: [ { required: true, message: '请输入商品的名称', trigger: 'blur' } ],
            goods_price: [ { required: true, message: '请输入商品的价格', trigger: 'blur' } ],
            goods_number: [ { required: true, message: '请输入商品的数量', trigger: 'blur' } ],
            goods_weight: [ { required: true, message: '请输入商品的重量', trigger: 'blur' } ],
            goods_cat: [ { required: true, message: '请选择商品分类', trigger: 'blur' } ]
           },
        //    商品分类列表
           catelist: [],
            selectCatesProps: {
                expandTrigger: 'hover',
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            // 动态参数列表数据
            manyTableData: [],
            // 静态参数列表
            onlyTableData: [],
            // 上传图片的url地址
            uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传的请求头
            headerObj: {
            Authorization: window.sessionStorage.getItem('token')
            },
            prePath: '',
            addlogVisible: false
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
      async getCateList() {
             const { data: res } = await this.$http.get(`categories`, {
              params: this.queryInfo
            })
            if (res.meta.status !== 200) {
                return this.$message.error('获取商品分类数据失败')
            }
            this.catelist = res.data
        },
        // 级联选择器选中项变化会触发这个函数
        parentCateChanged() {
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(avtiveName, oldActiveName) {
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请选择商品分类')
                return false
            }
        },
       async tabClicked() {
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
                if (res.meta.status !== 200) {
                  return this.$message.error('获取动态参数列表失败')
                }
                res.data.forEach(item => {
                   item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                   })
                this.manyTableData = res.data
            } else if (this.activeIndex === '2') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
                if (res.meta.status !== 200) {
                  return this.$message.error('获取静态属性失败')
                }
                this.onlyTableData = res.data
            }
        },
        // 预览图片处理函数
        handlePreview(file) {
            this.prePath = file.response.data.url
            this.addlogVisible = true
        },
        // 处理移除图片的操作
        handleRemove(file) {
            const filePath = file.response.data.tmp_path
           const i = this.addForm.pics.findIndex(x => x.pic === filePath)
           this.addForm.pics.splice(i, 1)
        },
        // 监听图片上传成功的事件
        handleSuccess(response) {
            const picInfo = { pic: response.data.tmp_path }
            this.addForm.pics.push(picInfo)
            },
        add() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) {
                    return this.$message.error('请填写必要的表单项！')
                }
               const form = _.cloneDeep(this.addForm)
               form.goods_cat = form.goods_cat.join(',')
            //    处理动态参数
            this.manyTableData.forEach(item => {
                const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
               this.addForm.attrs.push(newInfo)
            })
            // 处理静态属性
               this.onlyTableData.forEach(item => {
                   const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
                    this.addForm.attrs.push(newInfo)
               })
               form.attrs = this.addForm.attrs
            //    发起请求添加商品 商品名称必须是唯一的
                const { data: res } = await this.$http.post(`goods`, form)
                if (res.meta.status !== 201) {
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}
.previewImg {
    width: 100%;
}
.btnAdd {
    margin-top: 15px;
}
</style>